contact tracing possible it is obviously not the most effective way and researchers at the university of cape town argue would make things easier and more effective. has overseen the development of the corvee id every participant can register online and will then receive a q.r. codes this can be saved to one smartphone or simply printed out as fewer than half of all south africans own a smartphone. i can now use the code the idea that if i'm a very fine so let's say i'm a taxi operate our i'm a security guard i want to scan use s. yardbirds as they come in so you can. scan the barcode. it shows my name it should look my picture eventually it shows that i haven't been so off test that there's no information about whether i saw patrick covered from covert what has happened in the bank and isn't the app has centered your location to the wallet of the user and it simply has found the address of that user by looking at the q.r. code the data is not stored centrally to address privacy concerns the data is only stored on the user's phones if someone tests positive he or she can agree to sharing the anony